GDK_SELECTION_PRIMARY <- 1
GDK_SELECTION_SECONDARY <- 2
GDK_SELECTION_CLIPBOARD <- 69
GDK_TARGET_BITMAP <- 5
GDK_TARGET_COLORMAP <- 7
GDK_TARGET_DRAWABLE <- 17
GDK_TARGET_PIXMAP <- 20
GDK_TARGET_STRING <- 31
GDK_SELECTION_TYPE_ATOM <- 4
GDK_SELECTION_TYPE_BITMAP <- 5
GDK_SELECTION_TYPE_COLORMAP <- 7
GDK_SELECTION_TYPE_DRAWABLE <- 17
GDK_SELECTION_TYPE_INTEGER <- 19
GDK_SELECTION_TYPE_PIXMAP <- 20
GDK_SELECTION_TYPE_WINDOW <- 33
GDK_SELECTION_TYPE_STRING <- 31
